package com.map;

import java.util.HashMap;
import java.util.Map;

public class TestMap {

	public static void main(String[] args) {
		Map<String, String> map = new HashMap<String, String>();

		map.put("str1", "123");
		map.put("str2", "456");
		map.put("str3", "123");
		map.put("str4", "456");
		map.put("str5", "123");
		map.put("str6", "456");
		map.put("str7", "123");
		map.put("str8", "456");
		map.put("str9", "123");
		System.out.println(map);

		map.remove("str3");

		System.out.println(map);
		
		String str = "";
		str += 1 + ",";
		System.out.println(str);
		System.out.println(str.length());
	}
}
